重新启动重播Java游戏，而无需重新启动GUI

重新启动/重播Java游戏，而无需重新启动GUI

将数据（模型）与GUI（视图）分开。

举一个例子，您的计分板可能是JTable。JTable将在视图类中，而TableModel将在模型类中。

您对所有GUI组件都执行相同的 *** 作。对于每个组件，在模型类中都有一个组件数据模型。

这是我组装的秒表GUI的模型类。甚至都没有看到GUI，您应该能够识别构成秒表的所有数据组件。

package com.ggl.stopwatch.model;import java.util.ArrayList;import java.util.List;import javax.swing.table.DefaultTableModel;public class StopwatchModel {    protected boolean isSplitTime;    protected long startTime;    protected long endTime;    protected DefaultTableModel tableModel;    protected List<Long> splitTimes;    protected String[] columnNames = {"", "Increment", "Cumulative"};    public StopwatchModel() {        this.splitTimes = new ArrayList<Long>();        this.isSplitTime = false;        this.startTime = 0;        this.endTime = 0;        setTableModel();    }    public void resetTimes() {        this.splitTimes.clear();        this.isSplitTime = false;        this.startTime = 0;        this.endTime = 0;    }    public boolean isSplitTime() {        return isSplitTime;    }    public long getStartTime() {        return startTime;    }    public long getEndTime() {        return endTime;    }    public long getLastSplitTime() {        int size = splitTimes.size();        if (size < 1) { return getStartTime();        } else { return splitTimes.get(size - 1);        }    }    public long getPenultimateSplitTime() {        int size = splitTimes.size();        if (size < 2) { return getStartTime();        } else { return splitTimes.get(size - 2);        }    }    public DefaultTableModel getTableModel() {        return tableModel;    }    public int getTableModelRowCount() {        return tableModel.getRowCount();    }    public void clearTableModel() {        tableModel.setRowCount(0);    }    public int addTableModelRow(long startTime, long previousSplitTime,  long currentSplitTime, int splitCount) {        String[] row = new String[3];        row[0] = "Split " + ++splitCount;        row[1] = formatTime(previousSplitTime, currentSplitTime, false);        row[2] = formatTime(startTime, currentSplitTime, false);        tableModel.addRow(row);        return splitCount;    }    public void setStartTime() {        if (getStartTime() == 0L) { this.startTime = System.currentTimeMillis();        } else { long currentTime = System.currentTimeMillis(); int size = splitTimes.size(); if (size > 0) {     long splitTime = splitTimes.get(size - 1);     splitTime = splitTime - getEndTime() + currentTime;     splitTimes.set(size - 1, splitTime); } this.startTime = currentTime - getEndTime() + getStartTime();        }    }    protected void setTableModel() {        this.tableModel = new DefaultTableModel();        this.tableModel.addColumn(columnNames[0]);        this.tableModel.addColumn(columnNames[1]);        this.tableModel.addColumn(columnNames[2]);    }    public void setSplitTime() {        this.splitTimes.add(System.currentTimeMillis());        isSplitTime = true;    }    public void setEndTime() {        Long split = System.currentTimeMillis();        if (isSplitTime) { this.splitTimes.add(split);        }        this.endTime = split;    }    public String formatTime(long startTime, long time, boolean isTenths) {        long elapsedTime = time - startTime;        int seconds = (int) (elapsedTime / 1000L);        int fraction = (int) (elapsedTime - ((long) seconds * 1000L));        fraction = (fraction + 5) / 10;        if (fraction > 99) { fraction = 0;        }        if (isTenths) { fraction = (fraction + 5) / 10; if (fraction > 9) {     fraction = 0; }        }        int hours = seconds / 3600;        seconds -= hours * 3600;        int minutes = seconds / 60;        seconds -= minutes * 60;        StringBuilder builder = new StringBuilder();        builder.append(hours);        builder.append(":");        if (minutes < 10) builder.append("0");        builder.append(minutes);        builder.append(":");        if (seconds < 10) builder.append("0");        builder.append(seconds);        builder.append(".");        if ((!isTenths) && (fraction < 10)) builder.append("0");        builder.append(fraction);        return builder.toString();    }}

分离后，您可以将初始化方法放在模型类中。

编辑添加：将模型类的实例传递给视图类以生成视图。这是秒表GUI的主面板。

package com.ggl.stopwatch.view;import java.awt.Color;import java.awt.Component;import java.awt.Container;import java.awt.Dimension;import java.awt.FlowLayout;import java.awt.Font;import java.awt.GridBagConstraints;import java.awt.GridBagLayout;import java.awt.Insets;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import javax.swing.BorderFactory;import javax.swing.JButton;import javax.swing.JLabel;import javax.swing.JPanel;import javax.swing.SwingConstants;import com.ggl.stopwatch.model.StopwatchModel;import com.ggl.stopwatch.thread.StopwatchThread;public class StopwatchPanel {    protected static final Insets entryInsets = new Insets(0, 10, 4, 10);    protected static final Insets spaceInsets = new Insets(10, 10, 4, 10);    protected JButton resetButton;    protected JButton startButton;    protected JButton splitButton;    protected JButton stopButton;    protected JLabel timeDisplayLabel;    protected JPanel mainPanel;    protected JPanel buttonPanel;    protected JPanel startPanel;    protected JPanel stopPanel;    protected SplitScrollPane splitScrollPane;    protected StopwatchModel model;    protected StopwatchThread thread;    public StopwatchPanel(StopwatchModel model) {        this.model = model;        createPartControl();    }    protected void createPartControl() {        splitScrollPane = new SplitScrollPane(model);        createStartPanel();        createStopPanel();        setButtonSizes(resetButton, startButton, splitButton, stopButton);        mainPanel = new JPanel();        mainPanel.setLayout(new GridBagLayout());        int gridy = 0;        JPanel displayPanel = new JPanel();        displayPanel.setBorder(BorderFactory.createLineBorder(Color.BLUE, 6));        timeDisplayLabel = new JLabel(model.formatTime(0L, 0L, true));        timeDisplayLabel.setHorizontalAlignment(SwingConstants.CENTER);        Font font = timeDisplayLabel.getFont();        Font labelFont = font.deriveFont(60.0F);        timeDisplayLabel.setFont(labelFont);        timeDisplayLabel.setForeground(Color.BLUE);        displayPanel.add(timeDisplayLabel);        addComponent(mainPanel, displayPanel, 0, gridy++, 1, 1, spaceInsets,     GridBagConstraints.LINE_START, GridBagConstraints.HORIZONTAL);        buttonPanel = new JPanel();        buttonPanel.add(startPanel);        addComponent(mainPanel, buttonPanel, 0, gridy++, 1, 1, spaceInsets,     GridBagConstraints.LINE_START, GridBagConstraints.HORIZONTAL);        addComponent(mainPanel, splitScrollPane.getSplitScrollPane(), 0, gridy++, 1, 1, spaceInsets,     GridBagConstraints.LINE_START, GridBagConstraints.HORIZONTAL);    }    protected void createStartPanel() {        startPanel = new JPanel();        startPanel.setLayout(new FlowLayout());        resetButton = new JButton("Reset");        resetButton.addActionListener(new ActionListener() { @Override public void actionPerformed(ActionEvent event) {     model.resetTimes();     timeDisplayLabel.setText(model.formatTime(0L, 0L, true));     splitScrollPane.clearPanel();     mainPanel.repaint(); }        });        startPanel.add(resetButton);        startButton = new JButton("Start");        startButton.addActionListener(new ActionListener() { @Override public void actionPerformed(ActionEvent event) {     model.setStartTime();     thread = new StopwatchThread(StopwatchPanel.this);     thread.start();     displayStopPanel(); }        });        startPanel.add(startButton);    }    protected void createStopPanel() {        stopPanel = new JPanel();        stopPanel.setLayout(new FlowLayout());        splitButton = new JButton("Split");        splitButton.addActionListener(new ActionListener() { @Override public void actionPerformed(ActionEvent event) {     model.setSplitTime();     splitScrollPane.addSplit(model.getStartTime(),   model.getPenultimateSplitTime(),   model.getLastSplitTime());     splitScrollPane.setMaximum();     splitScrollPane.repaint(); }        });        stopPanel.add(splitButton);        stopButton = new JButton("Stop");        stopButton.addActionListener(new ActionListener() { @Override public void actionPerformed(ActionEvent event) {     model.setEndTime();     thread.setRunning(false);     if (model.isSplitTime()) {         splitScrollPane.addSplit(model.getStartTime(),       model.getPenultimateSplitTime(),       model.getLastSplitTime());         splitScrollPane.setMaximum();         splitScrollPane.repaint();     }     displayStartPanel(); }        });        stopPanel.add(stopButton);    }    protected void addComponent(Container container, Component component, int gridx, int gridy, int gridwidth, int gridheight,  Insets insets, int anchor, int fill) {        GridBagConstraints gbc = new GridBagConstraints(gridx, gridy,     gridwidth, gridheight, 1.0D, 1.0D, anchor, fill, insets, 0, 0);        container.add(component, gbc);    }    protected void displayStopPanel() {        buttonPanel.remove(startPanel);        buttonPanel.add(stopPanel);        buttonPanel.repaint();    }    protected void displayStartPanel() {        buttonPanel.remove(stopPanel);        buttonPanel.add(startPanel);        buttonPanel.repaint();    }    protected void setButtonSizes(JButton ... buttons) {        Dimension preferredSize = new Dimension();        for (JButton button : buttons) { Dimension d = button.getPreferredSize(); preferredSize = setLarger(preferredSize, d);        }        for (JButton button : buttons) { button.setPreferredSize(preferredSize);        }    }    protected Dimension setLarger(Dimension a, Dimension b) {        Dimension d = new Dimension();        d.height = Math.max(a.height, b.height);        d.width = Math.max(a.width, b.width);        return d;    }    public void setTimeDisplayLabel() {        this.timeDisplayLabel.setText(model.formatTime(model.getStartTime(),      System.currentTimeMillis(), true));    }    public JPanel getMainPanel() {        return mainPanel;    }}